I take this opportunity of defining a new genus of 
Mexican Orchidacee received by the Horticultural Society 
from the neighbourhood of Vera Cruz, where it was found 
by Mr. Theodore Hartweg, after whom, as the original 
Martai proves to be nothing but Chlorophytum, I have 
named it. : 
HARTWEGIA (Orchidacee $ Epidendree ). 
s 
Perianthium patulum, coloratum ; sepalis lateralibus basi productis labello 
đdnatis. Labellum cum columna connatum, basi gibbosum, limbo ovato basi 
calloso. Anthera 4-locularis. Pollinia 4, olivaceo-purpurea, filis replicatis. 
Caulis monophyllus. Pedunculus longissimus, capillaris, arctè vaginatus, 
apice floridus. 
H. purpurea. Folium solitarium, coriaceum, ovato-lanceolatum lentiginosum, 
cauli tereti æquale, pedunculo capillari multotiès brevius. Flores parvi, 
purpurei. Sepala acuta petalis paulo majora.  Labelli limbus basi albus 
eallosus. 
s . 
